(19)

(11)

EP 4 179 594 A1

(12)

(43) Date of publication: 17.05.2023 Bulletin 2023/20 (21) Application number: 20739671.4 (22) Date of filing: 10.07.2020

(51) International Patent Classification (IPC):  H01M 50/20(2021.01) H01M 50/24(2021.01) H01M 50/229(2021.01) H01M 50/317(2021.01) (52) Cooperative Patent Classification (CPC): H01M 50/20; H01M 50/229; H01M 50/24; H01M 50/317; Y02E 60/10 (86) International application number: PCT/EP2020/069632 (87) International publication number: WO 2022/008084 (13.01.2022 Gazette 2022/02)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (71) Applicant: Polarium Energy Solutions AB 113 63 Stockholm (SE)	(72) Inventor: KULLBERG, Johan 113 63 Stockholm (SE) (74) Representative: AWA Sweden AB  Box 45086 104 30 Stockholm 104 30 Stockholm (SE)